Leak detection near Pontllanfraith in Caerphilly
Leak detection near Pontllanfraith investigates concealed water loss in buildings within the Sirhowy Valley. ADI Leak Detection Caerphilly arranges visits across the county through head office. Pontllanfraith has a separate ADI Leak Detection town website for enquiries within the town.

Non-invasive leak detection
Acoustic, thermal and tracer gas
Trace and access claim reports
Which leak investigations cover the Pontllanfraith area of Caerphilly?
Gelli-groes Mill and Penllwyn Woodlands provide local reference points. Use Pontllanfraith and NP12 for the central settlement enquiry, then describe the affected room, nearby fittings and any area requiring a separate access arrangement.
Semi-detached accommodation represents 53.2% of the Pontllanfraith Census 2021 built-up area, with detached accommodation at 20.6% and terraces at 19.4%. Describe the actual arrangement of the affected home, particularly any extension or divided accommodation. The housing totals cannot reveal how water services pass between its rooms.
In a Pontllanfraith bathroom enquiry, separate observations at the fitting from marks elsewhere in the room. Explain whether the symptom follows bath, shower or basin use, and describe any ceiling or wall affected in the adjoining space. Known access panels are also useful booking details.
Which places around Pontllanfraith are in this county guide?
This county guide describes the places and landscape around Pontllanfraith.
- Pontllanfraith NP12
Local landmarks and terrain
- Gelli-groes Mill
- Penllwyn Woodlands
Who handles supply-pipe leaks around Pontllanfraith in Caerphilly?
Who owns the private supply pipe?
The property owner owns the private supply pipe between the street boundary and the internal stop tap.
What happens if a private supply pipe serves several properties?
Welsh Water says it will discuss repair options when it finds that a private supply pipe is shared.
Source: Dŵr Cymru Welsh Water guidance, checked 4 November 2026.
Report a leak on Dŵr Cymru Welsh Water's side of the boundary to Dŵr Cymru Welsh Water on 0800 052 0130, 24 hours a day, 7 days a week, or online at dwrcymru.com. Leaks inside the property and on its own supply pipe are the work we do.
Dŵr Cymru Welsh Water is the sewerage company for Pontllanfraith. Pipes serving more than one property, or serving a single property outside its boundary, are probably Welsh Water’s responsibility. Pipes serving only your property within its boundary are your responsibility.
Source: Dŵr Cymru Welsh Water guidance, checked 4 November 2026.
What should you know about county visits near Pontllanfraith?
Why give Pontllanfraith as well as the postal information?
The town’s main NP12 postal pairing uses BLACKWOOD as its post town. Naming Pontllanfraith identifies the actual settlement instead of relying on the broader postal label.
Can Gelli-groes Mill’s construction describe a nearby house?
The mill is a specific historic building within Pontllanfraith community. Its materials do not establish those of neighbouring homes; describe the affected property’s own surfaces and any known alterations.
How do you book a county visit near Pontllanfraith?
Send your postcode and a technical advisor calls back to arrange the visit with an engineer who covers Pontllanfraith.
Same or next day depending upon engineer availability.
